Coenzymes cannot function on their own and do require the presence of an enzyme. Some enzymes require several coenzymes and cofactors. Coenzyme Examples. The B vitamins serve as coenzymes essential for enzymes to form fats, carbohydrates and proteins.
According to the U.S. Food and Drug Administration, unopened commercially bottled water will keep safe indefinitely, as long as the bottles remain properly sealed and arenât damaged. After long-term storage, the bottled waterâs appearance, smell or taste may change somewhat, but the water will still be safe to consume, says the FDA. And while bottled water manufacturers are permitted to put expiration dates on their labels, these dates are meant to be indicators of quality, not safety.
Of course not water doesn't go bad. Having a freshness date on a bottle of water makes about as much sense as having an expiration date on sugar or salt. There are several reasons why water bottles come with an expiration date. The main one is government bureaucracy: water is a consumable food product, and as such, it is subject to laws requiring expiration dates on all consumables, from bologna to lemonade. Besides that, the expiration date on bottled water has certain benefits for the manufacturer. Although water, in and of itself, does not go bad, the plastic bottle it is contained in does expire, and will eventually start leaching chemicals into the water.